Long ago, Jiang Ziya, the foremost disciple of Jingxu Hall, fought alongside his master in a destructive war against demons and captured the Nine-Tailed Fox Demon. As the first to ascend the Stairway to Heaven, he was expected to become the leader of the gods.
However, his final task to execute the Nine-Tailed took a dark turn when the demon conjured an illusion showing Jiang Ziya an innocent girl trapped within her. Growing uncertain, he freed the fox spirit to save the girl. For this transgression, Jiang Ziya was banished to the North Sea, his divine power sealed, until he could no longer be haunted by the Nine-Tailed's mirage.
Ten years later, Jiang Ziya lives in the North Sea alongside his friend Shen Gongbao and his pet Si Bu Xiang. At a bar, he meets Xiao Jiu—who resembles the girl from the illusion. When he asks her about the Nine-Tailed Fox Demon's bracelet on her ankle, she tells him the accessory reveals to her a place where black flowers bloom. Torn between doubt and belief, Jiang Ziya accompanies Xiao Jiu to Mount Youdu. Thus, the two begin a perilous journey that may uncover not only the truth Jiang Ziya has sought, but also shocking revelations about the great war of the past.